Suppressed Charge Dispersion via Resonant Tunneling in a Single-Channel Transmon

A. Kringhøj; B. van Heck; T. W. Larsen; O. Erlandsson; D. Sabonis; P. Krogstrup; L. Casparis; K. D. Petersson; C. M. Marcus

doi:10.1103/PhysRevLett.124.246803

Suppressed Charge Dispersion via Resonant Tunneling in a Single-Channel Transmon

Mesoscale and Nanoscale Physics 2020-06-23 v2 Quantum Physics

Authors: A. Kringhøj , B. van Heck , T. W. Larsen , O. Erlandsson , D. Sabonis , P. Krogstrup , L. Casparis , K. D. Petersson , C. M. Marcus

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Abstract

We demonstrate strong suppression of charge dispersion in a semiconductor-based transmon qubit across Josephson resonances associated with a quantum dot in the junction. On resonance, dispersion is drastically reduced compared to conventional transmons with corresponding Josephson and charging energies. We develop a model of qubit dispersion for a single-channel resonance, which is in quantitative agreement with experimental data.

Keywords

charge dispersion transmon qubit resonant tunneling quantum dot Josephson resonance semiconductor single-channel model

Cite

@article{arxiv.1911.10011,
  title  = {Suppressed Charge Dispersion via Resonant Tunneling in a Single-Channel Transmon},
  author = {A. Kringhøj and B. van Heck and T. W. Larsen and O. Erlandsson and D. Sabonis and P. Krogstrup and L. Casparis and K. D. Petersson and C. M. Marcus},
  journal= {arXiv preprint arXiv:1911.10011},
  year   = {2020}
}

Suppressed Charge Dispersion via Resonant Tunneling in a Single-Channel Transmon

Abstract

Keywords

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